<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
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          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
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    <title>Document</title>
</head>
<body>
    <h1>
        welcome <span id="user"></span> this is home </h1>
</body>
<script>
    fetch('/get_user',{credentials:'include'})
        .then(res=>res.json())
        .then(data=>{
            document.querySelector('#user').innerHTML=data;
        });
</script>
</html>